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Sensors 2016, 16(3), 356; doi:10.3390/s16030356

An SDR-Based Real-Time Testbed for GNSS Adaptive Array Anti-Jamming Algorithms Accelerated by GPU

Department of Electronic Engineering, Tsinghua University, Weiqing Building, Tsinghua, Beijing 100084, China
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Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 22 December 2015 / Revised: 11 February 2016 / Accepted: 7 March 2016 / Published: 11 March 2016
(This article belongs to the Section Physical Sensors)

Abstract

Nowadays, software-defined radio (SDR) has become a common approach to evaluate new algorithms. However, in the field of Global Navigation Satellite System (GNSS) adaptive array anti-jamming, previous work has been limited due to the high computational power demanded by adaptive algorithms, and often lack flexibility and configurability. In this paper, the design and implementation of an SDR-based real-time testbed for GNSS adaptive array anti-jamming accelerated by a Graphics Processing Unit (GPU) are documented. This testbed highlights itself as a feature-rich and extendible platform with great flexibility and configurability, as well as high computational performance. Both Space-Time Adaptive Processing (STAP) and Space-Frequency Adaptive Processing (SFAP) are implemented with a wide range of parameters. Raw data from as many as eight antenna elements can be processed in real-time in either an adaptive nulling or beamforming mode. To fully take advantage of the parallelism resource provided by the GPU, a batched method in programming is proposed. Tests and experiments are conducted to evaluate both the computational and anti-jamming performance. This platform can be used for research and prototyping, as well as a real product in certain applications. View Full-Text
Keywords: Global Navigation Satellite System (GNSS) anti-jamming; adaptive array; software-define radio (SDR); Space-Time Adaptive Processing (STAP); Space-Frequency Adaptive Processing (SFAP); nulling; beamforming Global Navigation Satellite System (GNSS) anti-jamming; adaptive array; software-define radio (SDR); Space-Time Adaptive Processing (STAP); Space-Frequency Adaptive Processing (SFAP); nulling; beamforming
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, H.; Cui, X.; Lu, M. An SDR-Based Real-Time Testbed for GNSS Adaptive Array Anti-Jamming Algorithms Accelerated by GPU. Sensors 2016, 16, 356.

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